Extended Path Index is an extended index type based on the Zope index type that has additional query methods that are especially suited to generating navigation trees, site maps - and also supports querying a single folder, something the standard PathIndex can't do.

FileSystemStorage (FSS) is an Archetypes storage for storing fields raw values on the file system. This storage is used to avoid unnecessary growth of the ZODB's FileStorage (Data.fs) when using a lot of large files.

The mxODBC Zope / Plone Database Adapter allows you to easily connect your Zope or Plone installation to just about any database backend on the market today, giving you the reliability of the commercially supported eGenix.com product mxODBC and the flexibility of the ODBC standard as middle-tier architecture.